CE93Engineering Data Analysis
Mark Hansen, Fall 2009
Assignment 7
Due 10/20/2009 9:10 AM
1. Problem 5.5 in Ross.
2. Strong earthquakes occur according to a Poisson process in the Bay Area with a mean rate of
once every 50 years.
When such an earthquake occurs, there is a 0.2 probability that each of
the six bridges serving the area will collapse. Assume that bridge collapses resulting from the
earthquake are statistically independent of each other.
a) What is the probability of a strong earthquake occurring in the Bay Area in the
next 30 years?
b) What is the probability that three bridges will collapse in the event of a strong
earthquake?
c) What is the probability of not having any earthquakeinduced bridge collapses in
the next 30 years?
d) What is the expected number of earthquakeinduced bridge collapses in the next
30 years?
3. Problem 5.22 in Ross.
4. Problem 5.25 in Ross.
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CE93Engineering Data Analysis
Mark Hansen, Fall 2009
5. Random Walk
Code: Resources >Assignments > Assignment 7 > randomwalk_7.m,
Code (needed to run randomwalk_7.m): Resources > Mfiles> discrnd.m,
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 Fall '10
 hansen
 Probability theory, Bay Area, Mark Hansen, CE93Engineering Data Analysis

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